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×年×月×日14时7分,某市煤气公司液化气站的102号400m3液化石油气球罐发生破裂,大量液化石油气喷出,顺风向北扩散,遇明火发生燃烧,引起球罐爆炸。由于该球罐爆炸燃烧,大火烧了19个小时,致使5个400m3的球罐,4个450m3卧罐和8000多只液化石油气瓶(其中空瓶3000多只)爆炸或烧毁,罐区相邻的厂房、建筑物、机动车及设备等被烧毁或受到不同程度的损坏,直接经济损失约627万元,死36人,重伤50人。该球罐自投入使用后的两年零两个月使用期间,球罐经常处于较低容量,只有3次达到额定容量,第三次封装后4天,即在18日破裂。该球罐投用后,一直没有进行过检查,破裂前,安全阀正常,排污阀正常关闭。球罐的主体材质为I5MnVR,内径9200mm,壁厚25mm,容积400m3,用于贮存液化石油气。 1.根据断口特征和断裂力学的估算,该球罐的破裂是属于低应力的脆性断裂,主断裂源在上环焊缝的内壁焊趾上,长约65mm。 2.经宏观及无损检验,上、下环焊缝焊接质量很差,焊缝表面及内部存在很多咬边、错边、裂纹、熔合不良、夹渣及气孔等缺陷。 3.事故发生前在上下环焊缝内壁焊趾的一些部位已存在纵向裂纹,这些裂纹与焊接缺陷(如咬边)有关。 4.球罐投入使用后,从未进行检验,制造、安装中的先天性缺陷未及时发现和消除,使裂纹扩展,当球罐内压力稍有波动时便造成低应力脆性断裂。 根据以上内容回答下列问题: 该起事故应如何成立事故调查组

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2007年4月18日7时45分,某特殊钢有限责任公司生产车间的钢包整体平移到铸锭台上方时,突然整体脱落,钢包倒向正开班组会的交接班室,造成32人死亡、6人受伤的重大人身伤亡事故。 事故发生后,省、市各级领导迅速赶到现场,立即启动应急程序,开展搜救工作,及时把受伤人员送往医院,进行全力救治。以国家安全生产监督管理总局副局长为组长的事故调查组一行十余人,于当天21时许抵达该公司事故现场,立即展开对特钢厂钢水包脱落事故原因调查工作。 某特殊钢有限责任公司是经某市批准,具有高牌号钢生产能力的冶金企业。现已转制为民营企业,职工约300人,设计能力14万t/年。2006年实际生产7万t(销售收入3亿多元人民币),2007年计划生产12万t。 经专家对事故现场初步勘察分析,造成这起事故的主要原因,一是该公司生产车间起重设备不符合国家规定,按照《炼钢安全规程》的规定,起吊钢水包应采用冶金专用的铸造起重机,而该公司却擅自使用一般用途的普通起重机;二是设备日常维护不善,如起重机上用于固定钢丝绳的压板螺栓松动,三是作业现场管理混乱,厂房内设备和材料放置杂乱、作业空间狭窄、人员安全通道不符合要求;四是违章设置班前会地点,该车间长期在距钢水铸锭点仅5m的真空炉下方小屋内开班前会,钢水包倾覆后造成人员伤亡惨重的结果。 这是一起多年来冶金行业发生的一次死亡人数最多的特别重大生产安全事故,教训十分深刻。冶金行业有关部门单位应深刻吸取这次事故的沉痛教训,防范遏制重特大事故,加强安全生产监督与管理工作。 根据以上内容回答下列问题: 故障类型和影响分析方法的应用步骤是什么

属于人群分布的是( )

A. 城市肝癌死亡率和发病率高于农村
B. 吸毒、不正当行为可致艾滋病(获得性免疫缺陷综合征)
C. 霍乱可发生大流行
D. 森林脑炎见于春天
E. 流脑(流行性脑脊髓膜炎)多有隐性流行

Motorways are, no doubt the safest roads in Britain. Mile (21) mile, vehicle for ve hicle, you arc much (22) likely to be killed or seriously injured than on an ordinary road. On (23) hand, if you do have a serious accident on a motorway, fatalities are much more likely to (24) than in a comparable accident (25) on the roads. Motorways have no (26) bends, no roundabouts or traffic lights and (27) speeds are much greater than on other roads. Though the 70 mph limit is (28) in force, it is of ten treated with the contempt that most drivers have for the 30 mph limit applying in built up areas in Britain. Added to this is the fact that motorway drivers seem to like traveling in groups with perhaps (29) ten meters between each vehicle. The resulting horrific pile-ups (30) one vehicle stops for some reason--mechanical failure, driver error and so on—have become all (31) familiar through pictures in newspapers or on television. How (32) of these drivers realize that it takes a car about one hundred meters to brake to a stop (33) 70 mph.9 Drivers also seem to think that motorway driving gives them complete protection from the changing weather. (34) wet the road, whatever the visibility in mist or fog, they (35) at ridiculous speeds oblivious of police warnings or speed restrictions (36) their journey comes to a conclusion. Perhaps one remedy (37) this motorway madness would be better driver educa tion. At present, learner drivers are barred (38) motorways and are thus as far as this kind of driving is (39) , thrown in at the deep end. However, much more efficient poli cing is required, (40) it is the duty of the police not only to enforce the law but also to protect the general public from its own foolishness.

A. everywhere
B. elsewhere
C. anywhere
D. somewhere

CO中毒( )

A. 血中HbCO浓度升高
B. 化学性肺水肿
C. 高频电磁场
D. 造血功能异常
E. 肝血管肉瘤

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